Difference between revisions of "Marble/C3/More-on-Edit-Maps/English"

Title slide

Slide Number 2

Learning Objectives

• Add ground overlay
• Select an item
• Add a polygon hole
• Remove an item
• Clear all annotations

System Requirements

Ubuntu Linu x OS, version 16.04

Marble version 1.12.20 and

A working Internet connection.

The process demonstrated in t his tutorial is identical in

Ubuntu Linux OS, version 18.04

Marble version 2.2.20

Pre-requisites

www.spoken-tutorial.org

For the prerequisite Marble tutorials, please visit this site.

Code Files

Please download and ex tract the files to Desktop.

I have downloaded and saved the files to my Desktop folder

We have already learnt about some icons in the Edit Maps panel.

I have added a Placemark, a Polygon and a Path on the map.

Click on Cut or Remove option from the Context menu.

Ground Overlay

Locate India on the map.

Click on the Ground Overlay icon.

location of India on the map.

Click on the Ground Overlay icon in the Edit Maps panel.

Click on the Browse button at the left corner of the dialog box.

Click on the Browse button at the top left corner of the dialog box.

My image file is kept on the Desktop folder.

Double click on the Desktop folder.

I have saved my image file in the Desktop folder.

Double click on the Desktop folder.

From the folder select the desired image and click on the Open button.

Point to the Files of type field.

Here you can see the image India-Flag.png

Select the image by clicking on it.

The same name appears in the File name field.

Note that the image file should be in the .png file format.

Click on the Open button in the box.

In the Name field type the name as India-flag.

Click on OK button in the Edit ground overlay dialog box.

Click on the double arrow icons in the border of the image.

Drag and drop the image

Resize the image using the arr ow handles.

You can also drag and drop the image as per your choice.

click on Select item icon.

Select Item option can b e used to select an item on the map.

Right click on the polygon area.

Point to context menu .

This indicates that the polygon area is in selected mode.

Right-click on the polygon area.

A context menu opens.

Add Polygon box opens.

We will change the colour of our polygon area.

Select colour window opens.

From the colour box select brown colour.

Select Color window opens.

I will select brown colour.

Click on the OK button at the left corner of the Add Polygon dialog box.

Click on the OK button at the bottom right corner of Add Polygon dialog box.

Left click on the Polygon area.

Left click on the Polygon area.

Polygon area is in selected mode.

Now i will paste this polygon at the outer side of the map

Select Copy option from the context menu.

Now I will paste this polygon outside the map.

Select Remove option from the Context menu

Right click on the polygon area.

Select Remove option from the context menu.

Click on the Yes button.

Point on the polygon

Click on the Yes button.

The polygon is removed from the map.

Point to Polygon area.

We can place this polygon anywhere using the drag and drop method.

let us move back this to the previous location.

let us move back the polygon to its previous location.

To highlight an area on the polygon we can use Add Polygon Hole icon.

Holes can be made in the existing polygon to highlight a particular region.

Point to Malapuram.

Here I will add a polygon hole in the region of Malapuram.

Start marking nodes on the region of Malapuram.

We see a Polygon hole in the area of Malapuram.

Start marking nodes on the region of Malapuram.

Observe that Malapuram area is marked with a polygon hole.

We can add more nodes using the Add nodes icon.

Click on Add nodes icon.

Select the path, Path-1.

Place the cursor on the ending node.

Drag it to the desired location.

Extending path by dragging the node.

Click on Add nodes icon.

Select the path from Pune to Satara named as Path-1.

Place the cursor on the ending node and drag it to the desired location.

I will extend the path to Kolhapur.

To remove any item from the map, we can use Remove item icon.

Go to Path-1 and click on it.

Click on Remove item icon.

Go to Path-1 and click on it.

Click on Remove item icon in the panel.

Click on the Yes button.

Point on the map.

Click on the Yes button.

Path-1 has been removed from the map.

Click on the Clear All Annotations icon.

Point to the message.

Click on Clear all annotations icon.

A message Are you sure you want to clear all annotations? appears.

Click on Cancel button.

Since I don't want to remove the items on the map I will click on Cancel button.

Point to all the icons in the view menu.

Notice that all the icons in Edit maps panel are also available in the View menu.

Summary

In this tutorial we have learnt to,

• Add ground overlay
• Select an item
• Add a polygon hole
• Remove an item
• Clear all annotations

Assignment

Locate Austraia on the map and add its flag as Ground Overlay.

Hint: The image of the flag of Australia is provided in the Code files link.

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Slide Number 12

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